999722613 has 4 divisors (see below), whose sum is σ = 1332963488. Its totient is φ = 666481740.

The previous prime is 999722599. The next prime is 999722617. The reversal of 999722613 is 316227999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 999722613 - 2⁸ = 999722357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999722617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166620433 + ... + 166620438.

It is an arithmetic number, because the mean of its divisors is an integer number (333240872).

Almost surely, 2^999722613 is an apocalyptic number.

It is an amenable number.

999722613 is a deficient number, since it is larger than the sum of its proper divisors (333240875).

999722613 is a wasteful number, since it uses less digits than its factorization.

999722613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333240874.

The product of its digits is 367416, while the sum is 48.

The square root of 999722613 is about 31618.3904239289. The cubic root of 999722613 is about 999.9075291161.

The spelling of 999722613 in words is "nine hundred ninety-nine million, seven hundred twenty-two thousand, six hundred thirteen".